got this code tonight truck is a 03cummins . 6 speed 4x4 st . stumbled like you had cut it off . did it 2 times with in a few sec ran fine after that got home unpluged the xzt 65 hp box instaled bypass pulg still runs fine but check engin light still on . the code sez to munch voltage to fuel pressurs sensor . is it safe to drive and what is the fix . need it to get to work in the morning thanks . robbie .

 

should be fine check light will go away after several starts. i would check all the plugs before reinstalling the box tho

 

thanks rich . thank i'm going to buy another box . running fine with out a box . so i think my xzt . is fried. thinking about bd or another quad 140hp . thanks agin robbie